Pocket Watch Database
Patent Archive
#138779
Patent Information
Watch Key
Samuel G. Hall
Francis E. Allen
May 13, 1873
Patent #138779
| Patent Number: | 138779 |
| Description: | Watch Key |
| Inventor(s): |
Samuel G. Hall Francis E. Allen |
| Patent Date: | May 13, 1873 |
| Registration Type: | Patent |
| External Research: | https://www.google.c… |
| Patent Document: |
